Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

pertinacious

play
adjective per·ti·na·cious \ˌpər-tə-ˈnā-shəs\

Definition of pertinacious

  1. 1 a :  adhering resolutely to an opinion, purpose, or design b :  perversely persistent

  2. 2 :  stubbornly tenacious

per·ti·na·cious·ly adverb
per·ti·na·cious·ness noun
per·ti·nac·i·ty play \-ˈna-sə-tē\ noun


Examples of pertinacious

  1. <a pertinacious little boy who was determined to catch and collect reptiles>

  2. <a pertinacious salesman who would simply not take No! for an answer>



Origin of pertinacious

Latin pertinac-, pertinax, from per- thoroughly + tenac-, tenax tenacious, from tenēre


First Known Use: 1626

Synonym Discussion of pertinacious

obstinate, dogged, stubborn, pertinacious, mulish mean fixed and unyielding in course or purpose. obstinate implies usually an unreasonable persistence <an obstinate proponent of conspiracy theories>. dogged suggests an admirable often tenacious and unwavering persistence <pursued the story with dogged perseverance>. stubborn implies sturdiness in resisting change which may or may not be admirable <a person too stubborn to admit error>. pertinacious suggests an annoying or irksome persistence <a pertinacious salesclerk refusing to take no for an answer>. mulish implies a thoroughly unreasonable obstinacy <a mulish determination to have his own way>.

Learn More about pertinacious


Seen and Heard

What made you want to look up pertinacious? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 9, 2016

marked by high spirits and laughter

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

kittly-benders duvet pince-nez spindrift
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ